JPH05168808A - Solvent composition for removal of sticking water - Google Patents

Abstract

PURPOSE:To obtain a substitutive solvent compsn. 1,2-dimethyl hexa fluorocyclobutane which is to be used for removal of water stuck to electronic parts, precision machine parts, glass substrates, etc., and gives no influenece on the ozone layer. CONSTITUTION:The solvent compsn. consists of 1,2-dimethyl hexafluorocyclobutane as the essential component to which at least one kind of solvent selected from alkanes having >=5 carbon number, cycloalkanes having >=5 carbon number, alcohols, ketones, ethers, halogenated hydrocarbons, and chlorinated and fluorinated hydrocarbons, and/or a surfactant comprising a salt of an org. acid with org. base are compounded. The amt. of the solvent soluble in 1,2-dimethyl hexafluorocyclobutane is specified to 0.1-50wt.%, and the amt. of the surfactant comprising a salt of an org. acid with an org. base is specified to 0.001-10wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent composition used for removing adhered water on printed circuit boards, electronic parts such as ICs, precision machine parts, glass substrates and the like.

[0002]

2. Description of the Related Art Non-flammable, low toxicity,
1,1,2-trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113), which has excellent stability, or a mixed solvent composition of this R113 and a solvent soluble in it, or the interface with R113 Mixed solvent compositions comprising activators are widely used. R113 has a feature that it can remove adhered water without attacking base materials such as metals, plastics and elastomers, so various precision machine parts and various electronic parts made of metal, plastics, elastomers, etc., and mounting these electronic parts It was most suitable for removing adhered water from printed circuit boards such as glass substrates.

[0003]

[Problems to be Solved by the Invention] Conventionally used R1
Despite having various advantages, 13 is chemically particularly stable, so that it has a long life in the troposphere and diffuses into the stratosphere where it is decomposed by ultraviolet rays to generate chlorine radicals. Chlorine radicals cause a chain reaction with stratospheric ozone, which destroys the ozone layer.

Therefore, in place of the conventional R113, an alternative solvent for removing adhered water that is less likely to destroy the ozone layer is being actively searched. As the alternative solvent for removing adhered water, 2,2-
Dichloro-1,1,1-trifluoroethane, 1,1-dichloro-1
-Fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, 1,3-dichloro-1,1,2,2,3-pentafluoropropane, etc. have been developed.

These alternative solvents for removing adhered water have excellent adherent water removal properties similar to those of R113, and have a very small effect on the ozone layer. However, these alternative adherent water removing solvents have a slight effect on the ozone layer because they contain chlorine atoms. Therefore, there is a demand for the development of a more excellent alternative adherent water removing solvent that does not affect the ozone layer at all.

[0006] The present invention is a novel fluorinated hydrocarbon-based adhering water removal solvent that can be used as an alternative adsorbing water removal solvent that does not affect the ozone layer at all while satisfying the excellent properties of conventional R113. It is intended to provide a solvent composition.

[0007]

The present invention has been made to achieve the above-mentioned object, and firstly, (A) 1,2-dimethylhexafluorocyclobutane and (B) 1,2-dimethylhexa Provided is a solvent composition for removing adhered water, which comprises a solvent soluble in fluorocyclobutane and (C) a surfactant composed of a salt of an organic acid and an organic base.

Secondly, the present invention provides a solvent composition for removing adhered water, which comprises (A) 1,2-dimethylhexafluorocyclobutane and (B) a solvent soluble in 1,2-dimethylhexafluorocyclobutane. provide.

Thirdly, the present invention provides a solvent composition for removing adhered water, which comprises (A) 1,2-dimethylhexafluorocyclobutane and (C) a surfactant comprising a salt of an organic acid and an organic base. provide.

The composition of the present invention comprises (A) 1,2-dimethylhexafluorocyclobutane (hereinafter referred to as DHFCB).
Containing (B) DHF
As a solvent soluble in CB, (b-1) alkanes having 5 or more carbon atoms, (b-2) cycloalkanes having 5 or more carbon atoms, (b-3) alcohols, (b-4) ketones, (b-5) ethers, (b-
6) At least one solvent selected from halogenated hydrocarbons, (b-7) chlorinated fluorinated hydrocarbons, and / or (C) a surfactant composed of a salt of an organic acid and an organic base It will be done.

(B) DHFC used in the composition of the present invention
Examples of (b-1) alkanes having 5 or more carbon atoms and (b-2) cycloalkanes having 5 or more carbons as a solvent soluble in B include pentane, 2-methylbutane, 2,2-dimethylpropane, Hexane, 2-methylpentane, 3-methylpentane,
2,2-dimethylbutane, 2,3-dimethylbutane, heptane,
2-methylhexane, 3-methylhexane, 2,3-dimethylpentane, 2,4-dimethylpentane, octane, 2,2,3-trimethylpentane, 2,2,4-trimethylpentane, cyclopentane, methylcyclopentane , Cyclohexane, methylcyclohexane, ethylcyclohexane, and the like, but are not limited thereto.

(B) (b-as a solvent soluble in DHFCB
3) As alcohols, methanol, ethanol, i-
It may include, but is not limited to, propanol, n-propanol, n-butanol, i-butanol, s-butanol, t-butanol and the like.

(B) (b-as a solvent soluble in DHFCB
4) As ketones, acetone, methyl ethyl ketone,
Methyl butyl ketone, methyl isobutyl ketone, etc. may be mentioned, but not limited thereto.

(B) (b-as a solvent soluble in DHFCB
5) Ethers may include, but are not limited to, diethyl ether, methyl cellosolve, tetrahydrofuran, 1,4-dioxane and the like.

(B) (b-as a solvent soluble in DHFCB
6) As halogenated hydrocarbons, dichloromethane, ci
Examples thereof include, but are not limited to, s-1,2-dichloroethylene, trans-1,2-dichloroethylene, and 2-bromopropane.

The (b-7) chlorinated fluorinated hydrocarbons (B) as a solvent soluble in DHFCB include 2,2-dichloro-1,1,1-trifluoroethane, 1,1 -Dichloro-1-fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, 1,3-dichloro-1,1,2,2,3-pentafluoropropane, 1, 1-dichloro-1,2,2,3,3-pentafluoropropane, 1,2-dichloro-1,1,3,3,3-pentafluoropropane, 1,2-dichloro-1,1,2, Examples include 3,3-pentafluoropropane, 2,3-dichloro-1,1,1,2,3-pentafluoropropane, 2,2-dichloro-1,1,1,3,3-pentafluoropropane, etc. Uru, but not limited to this.

As the surfactant (C) consisting of a salt of an organic acid and an organic base, which can be used in the composition of the present invention, various kinds of surfactants can be exemplified in a wide range. In particular, a salt of a higher fatty acid and a higher aliphatic amine is used. Caprylic acid caprylamine,
Caproyl caproate, capryl amine hexylate, dodecyl amine hexylate, stearyl amine hexylate, etc. are exemplified as preferable ones.

The mixing composition ratio of the composition of the present invention is not particularly limited, but preferably, the content of the (B) DHFCB-soluble solvent is 0.1 to 50% by weight, and (C) the organic compound. Content of surfactant consisting of salt of acid and organic base is 0.001
~ 10% by weight.

In the composition of the present invention, other components may be further added and mixed, if necessary. For example, in the use as a solvent, nitro compounds such as nitromethane, nitroethane, nitropropane and nitrobenzene, amines such as diethylamine, triethylamine, i-propylamine, butylamine and i-butylamine, ethyl acetate, propyl acetate and butyl acetate. Esters such as phenol, o-cresol, m-cresol, p-cresol, thymol, pt-butylphenol, t-butylcatechol, catechol, isoeugenol, o-methoxyphenol, 4,4'-dihydroxyphenyl-2, 2-Propane, isoamyl salicylate, benzyl salicylate, methyl salicylate, phenols such as 2,6-di-t-butyl-p-cresol, 2- (2'-hydroxy-5'-methyl-phenyl) benzotriazole, 2 -(2'-Hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotri Orres,
1,2,3-benzotriazole, 1-[(N, N-bis-2-ethylhexyl) aminomethyl] benzotriazole triazoles and the like can be appropriately added.

A solvent composition for removing adhered water of the present invention comprising (A) DHFCB and (B) a solvent soluble therein and / or (C) a surfactant comprising a salt of an organic acid and an organic base, Since it has the same ability to remove adhered water as the conventional R113 series, it can be suitably used for various purposes.

As a method of removing the adhered water, hand-wiping, dipping,
Spraying, shaking, ultrasonic cleaning, steam cleaning or the like may be adopted.

[0022]

EXAMPLES Examples of the present invention will be shown below.

Examples 1 to 23 Adhesion water removal tests were conducted using the cleaning solvent compositions shown in Tables 1 to 4. That is, a 30 mm × 18 mm × 5 mm glass plate was dipped in pure water, then dipped in the cleaning solvent composition of the present invention shown in Tables 1 to 4 for 20 seconds to drain the glass plate, and the taken out glass plate was placed in anhydrous methanol. The state of removal of the adhered water was judged from the increased amount of water after immersion. The degree of removal of the adhered water is shown in Tables 1 to 4 as the degree of removal.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

[0028]

EFFECT OF THE INVENTION A solvent composition for removing adhered water, which comprises 1,2-dimethylhexafluorocyclobutane of the present invention and a solvent soluble therein and / or a surfactant comprising a salt of an organic acid and an organic base, In addition, there are advantages such as satisfying the excellent properties of the conventional R113, especially the adhering water removal property, and not affecting the ozone layer.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location C11D 7:26) (72) Inventor Yoko Usami 1150 Hazawa-machi, Kanagawa-ku, Yokohama-shi, Kanagawa Asahi Glass Co., Ltd. Central Research In-house

Claims (12)

[Claims] 1. A surfactant comprising (A) 1,2-dimethylhexafluorocyclobutane, (B) a solvent soluble in 1,2-dimethylhexafluorocyclobutane, and (C) a salt of an organic acid and an organic base. And a solvent composition for removing adhered water. 2. A solvent composition for removing adhered water, which comprises (A) 1,2-dimethylhexafluorocyclobutane and (B) a solvent soluble in 1,2-dimethylhexafluorocyclobutane. 3. A solvent composition for removing adhered water, which comprises (A) 1,2-dimethylhexafluorocyclobutane and (C) a surfactant comprising a salt of an organic acid and an organic base. 4. A solvent soluble in (B) 1,2-dimethylhexafluorocyclobutane (b-1) an alkane having 5 or more carbon atoms,
(b-2) C5 or more cycloalkanes, (b-3) alcohols, (b-4) ketones, (b-5) ethers, (b-6) halogenated hydrocarbons, ( b-7) At least one solvent selected from chlorinated fluorinated hydrocarbons.
A solvent composition for removing adhered water. 5. A solvent soluble in (B) 1,2-dimethylhexafluorocyclobutane (b-3) alcohols, (b-1) alkanes having 5 or more carbon atoms, and (b-2) carbon atoms. At least 5 or more cycloalkanes, (b-4) ketones, (b-5) ethers, (b-6) halogenated hydrocarbons, (b-7) chlorinated fluorinated hydrocarbons The solvent composition for removing adhered water according to claim 2, comprising a mixture with one or more solvents. 6. The solvent composition for removing adhered water according to claim 1, wherein the surfactant (C) consisting of a salt of an organic acid and an organic base is a salt of a higher fatty acid and a higher aliphatic amine. 7. (B) The content of a solvent soluble in 1,2-dimethylhexafluorocyclobutane is 0.1% by weight to 50% by weight, and (C) a surface active agent comprising a salt of an organic acid and an organic base. The solvent composition for removing adhered water according to claim 1, wherein the content of the agent is 0.001% by weight to 10% by weight. 8. The solvent composition for removing adhered water according to claim 2, wherein the content of the solvent soluble in (B) 1,2-dimethylhexafluorocyclobutane is 0.1% by weight to 50% by weight. 9. The solvent composition for removing adhered water according to claim 3, wherein the content of the surfactant (C) consisting of a salt of an organic acid and an organic base is 0.001 to 10% by weight. 10. A solvent soluble in (B) 1,2-dimethylhexafluorocyclobutane is (b-1) an alkane having 5 or more carbon atoms, (b-2) a cycloalkane having 5 or more carbon atoms, b-3) alcohols, (b-4) ketones, (b-5) ethers, (b-
6) at least one solvent selected from halogenated hydrocarbons and (b-7) chlorinated fluorinated hydrocarbons,
The solvent composition for removing adhered water according to claim 7, wherein the surfactant (C) consisting of a salt of an organic acid and an organic base is a salt of a higher fatty acid and a higher aliphatic amine. 11. A solvent soluble in (B) 1,2-dimethylhexafluorocyclobutane is (b-1) an alkane having 5 or more carbon atoms, (b-2) a cycloalkane having 5 or more carbon atoms, b-3) alcohols, (b-4) ketones, (b-5) ethers, (b-
The solvent composition for removing adhered water according to claim 8, which is at least one solvent selected from 6) halogenated hydrocarbons and (b-7) chlorinated fluorinated hydrocarbons. 12. The solvent composition for removing adhered water according to claim 9, wherein (C) the surfactant comprising a salt of an organic acid and an organic base is a salt of a higher fatty acid and a higher aliphatic amine.